A printhead for dispensing a fluid is provided. The printhead comprises at least one chamber; an array of piezoactuated flow channel dispensers enclosed in the at least one chamber; a multi-orifice dispensing plate; and an air dispensing element comprising a source of compressed air and an air flow controller configured to direct a flow of air.

The invention relates to a device for generating a CO.sub.2 snow jet, comprising an expansion channel (6) which extends in a flow direction (14) for generating a CO.sub.2 gas/CO.sub.2 snow mixture based on liquid CO.sub.2, said expansion channel having an inlet opening (18) for supplying liquid CO.sub.2 and an outlet opening (22) for discharging the CO.sub.2 gas/CO.sub.2 snow mixture. The device also comprises a nozzle for generating an outer jet which surrounds and accelerates the CO.sub.2 gas/CO.sub.2 snow mixture discharged from the outlet opening of the expansion channel. The expansion channel has multiple channel sections (36a, 36b, 36c, 36d, 36e) arranged one behind the other in the flow direction, wherein the expansion channel cross section (40) that lies on a plane orthogonal to the flow direction changes locally in a particular transition or transition region (38a, 38b, 38c, 38d, 38e, 38f) between the channel sections, and the expansion channel (6) cross section (46d) at the upstream end (48d) of a particular channel section (36d) is larger than the expansion channel (6) cross section (46c) at the upstream end (48c) of the channel section (36c) arranged upstream of said channel section (36d) in the flow direction (14).

A spray gun nozzle may include a main body, and a spray hole is formed at a front end thereof. A tapered cylindrical guiding surface having gradually wider diameter from rear to front is extended forwardly from the spray hole, and the inclined angle of the guiding surface with respect to the spray hole is between 45 degrees and 75 degrees. A plurality of air grooves having U-shaped cross-section are formed on the outer periphery of the front end of the main body axially extending from a front end of the guiding surface, and the air grooves are spaced apart with the same interval. With the air grooves on the front end of the main body having the fixed groove diameter, the flow rate of the high-pressure airflow passing through the air groove is consistent.

A HVLP spray unit with an electric fan comprising a needle valve for metering the paint which is fed to an air cap, the needle valve comprising a valve body with an elongate interior space, a valve needle, a compression spring and a seal, the interior space between the seal and a nozzle opening of the valve body being configured as a paint chamber, into which a feed channel for the paint opens and which is flowed through by the paint during spray operation of the HVLP spray unit. Here, the interior space of the valve body is tapered between the feed channel and the seal in such a way that a needle guide is formed, and that, in a manner which lies opposite the paint chamber, the seal is arranged so as to bear against the needle guide.

Provided is a visual insulating spray lance for live working. A liquid guide tube and an air tube in a hollow operating rod are communicated with an inlet end of a spray nozzle; the operating rod is connected to a connecting rod and a display respectively through a fastener; a video optical transceiver fixedly arranged on the connecting rod is connected to the display through an optical fiber; the optical fiber is connected to an optical receiver, the optical receiver is connected to a chip for a video signal processor, the chip for a video signal processor is connected to a power divider having two output interfaces respectively connected to a display screen and a 4G communication module; a battery is connected to the optical receiver, the chip for a video signal processor, the power divider, the display screen, the 4G communication module, and a global positioning system (GPS) module.

The invention provides an analytic nebuliser device for delivering a sample in aerosolised form, the device comprising a nebuliser nozzle configured to receive a flow of said sample and generate a plume of aerosolised sample spray and a chamber configured to receive a flow of make-up gas and connecting with a plurality of microchannels having outlets arranged around and adjacent to said nebuliser nozzle wherein the microchannels are configured to produce a make-up gas stream with high linear velocity around said aerosolised sample spray to shape and direct said plume. The invention extends to a mass spectrometry or spectroscopy system including the above analytic nebuliser device, to provide in operation the aerosolised sample spray to an ionisation device of the system.

An object of the present invention is to provide a spray device that can separately apply a coating liquid, and can form a dense organic substance film having high uniformity, and a spray coating method. To achieve the object, the spray device includes: a spray; an air flow forming unit that forms an air flow for restricting a flying space of a coating liquid sprayed by the spray; and a space heating unit that heats the flying space of the coating liquid from outside of the air flow formed by the air flow forming unit.

The present invention provides a nozzle (201), which comprises a nozzle passage (512) and a fluid passage (511), wherein the nozzle passage has an airflow inlet (515) and an airflow outlet (516). The fluid passage has a fluid passage inlet (518) and a fluid passage outlet (514), wherein the fluid passage inlet communicates with a fluid source so that a fluid can enter the fluid passage, and the fluid passage outlet communicates with the nozzle passage so that the fluid can enter the nozzle passage, and the airflow exerted from the airflow inlet can press the fluid in the nozzle passage out of the airflow outlet. The nozzle provided by the present application can distribute a small volume of a viscous fluid and is not apt to get blocked.

A liquid spray gun nozzle assembly is disclosed comprising a coating liquid inlet portion comprising a liquid connector for connection to an external liquid source; a coating liquid outlet portion comprising a liquid nozzle for spraying a coating liquid fed into the nozzle assembly through the coating liquid inlet portion, the liquid nozzle being disposed along a spray axis; a coating liquid flow path fluidly connecting the coating liquid inlet portion to the liquid nozzle; and a spray gun connection portion opposite the coating liquid outlet portion adapted to connect the liquid spray gun nozzle assembly to a compatible liquid spray gun body. The spray gun connection portion comprises a nozzle assembly sealing surface adapted to seal the liquid spray gun nozzle assembly to the compatible liquid spray gun body, the nozzle assembly sealing surface comprising first and second sealing members that are each circular and concentric with one another.

An aerosol unit for an aerosol dispenser, which aerosol unit comprises an axially oriented body, having a distal inlet part and a proximal outlet part; a carrier member arranged in the body, transversally to the axis between the inlet part and the outlet part; and wherein the carrier member comprises through-holes which place the inlet part in fluid communication with the outlet part, and wherein the carrier member is insert-moulded into the body such that a contact surface between the carrier and the body forms an air-tight seal.